✅Good Waterproof Effect - The bicycle rear light is made of high-quality plastic material and is highly waterproof. The taillight can withstand all adverse weather conditions, making riding in the rain safe and worry-free. | ✅It also has a low battery reminder function. 6 Flashing Modes - The bicycle rear light has 6 dimming modes, providing super bright illumination on the rear 220°, making it easy to find and greatly improving safety. | ✅Suitable Size - The suitable seatpost size for bicycle taillights is: 25-27mm/0.98-1.06in. Use a screwdriver to quickly complete the installation and disassembly, simple and convenient. | ✅The taillights can be firmly fixed to the frame without worrying about loosening during riding. Battery Operated - The bicycle taillight can be powered by 2 AAA batteries, waterproof and shockproof, especially suitable for cross-country bikes and friends who often ride at night. (Note: This model does not include batteries; batteries need to be purchased separately.) | ✅Multifunctional bicycle taillights can be used not only on bicycles, but also on helmets, strollers, backpacks, and pet collars. Outdoors, it can be inserted on a backpack, mounted on a rack, armrest, and other security warning places, and the effect is very perfect. | ✅Note: The taillight is battery-powered (not included), low power consumption. | ✅【From Caper Trade ✅】.. If you receive the order and it is in good condition and as described and pictured, we would be grateful if you could leave us a 5-star positive feedback. If you have any problems, please contact us at our number on the seller details page (click on the seller name to access the Caper Trade seller details)